Clamping and bending implement



Aug. 9, 1960 G. A. KERR CLAMPING AND BENDING IMPLEMENT 2 Sheets-Sheet 1Filed Feb. 10, 1958 INVENTOR.

George A. KW?

1960v G. A. KERR 2,948,323

CLAMPING AND BENDING IMPLEMENT Filed Feb. 10, 1958 2 Sheets-Sheet 2 a%agl';

Patented Aug. 9, 19

CLAlVfllNG AND BENDING IIVIPLEMENT George A. Kerr, 3930 Napier St.,North Burnaby, British Columbia, Canada Filed Feb. 10, 19 s, Ser. No.714,185

3Claims. 01. 153-38) My invention relates to improvements in workclamping and bending implements for exerting pressure at a plurality ofspaced points against the work for clamping and bending operationsthereon.

The primary object of my invention is to provide an inexpensive simplyconstructed and easily operated implement for applying pressure at threepoints against bendable metal stock such as bar stock, round or flat orpolygonal or tubular incross section to variably bend the same oragainst steamed bendable flat strip wood stock laminated or solid forbending the same or clamping the laminations together for gluing andwhich is adapted for use in reaming a flange around a hole in flat stockand for a wide range of adjustments for such operations on such stock orto ream a flange around holes of different sizes.

Still another object is to provide an implement in accordance with theforegoing equipped with clamp-ing and bending rollers having flat treadsfor clamping or bending fiat stock, or with concave rollers for bendinground stock or with V-grooved rollers for bending stock of polygonalcross section.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

Figure 1 is a perspective view of my improved implement equipped withflat faced clamping and bending rollers and adjusted for clampingtogether laminations of a laminated strip of one size;

Figure 2 is an enlarged fragmentary view in vertical cross section takenon the line 2--2 of Figure 1;

Figure 3 is an enlarged fragmentary view in vertical cross section takenon the line 33 of Figure 1;

Figure 4 is an enlarged fragmentary view in vertical cross section takenon the line 4--4 of Figure 2;

Figure 5 is a fragmentary view in perspective on a smaller scale of aportion of the implement equipped with a concave roller for bendinground or tubular stock;

Figure 6 is a fragmentary view in perspective on a smaller scale of aportion of the implement equipped with a V-grooved roller for bendingbar stock of rectangular cross section;

Figure 7 is an enlarged fragmentary view in side elevation partly insection of the same;

plement adjusted and operated to bend bar, or round, or tubular stock ofone size;

Figure 12 is a plan view on a smaller scale of the implement adjustedand operated to bend a larger size of bar, or round, or tubular stock ina dilferent manner, and

Figure 13 is a plan view on a smaller scale of a modification of theinvention.

Referring to the drawings by numerals, and first to Figures 1 to 12, theimplement of my invention comprises as its main components a triangularflat bar frame designated generally by the numeral 1 supporting atriangularly' arranged series of coplanar pressure rollers on one andthe same side of the frame and having axes at a right angle to saidframe, and presently described in detail.

The frame 1 comprises a base side bar 3 and a pair of first and secondauxiliary side bars 5, 7 crossing and intersecting the main bar 3 andcrossing and intersecting each other at one side of the main bar 3.

The series of rollers are spaced longitudinally of the main bar 1 andcomprise a first roller 9 at the intersection of the first auxiliary bar5 and the main bar 1, a second roller 11 and a third roller 13 at theintersection of said auxiliary bars 5, 7 intermediate the first andsecond rollers 9, 11 and spaced further from the main bar 1 than therollers 9, 11, and at said one side of the main bar 1.

A transverse bolt 15 pivotally connects the first auxiliary bar 5 andmain bar 1 at the point of intersection thereof and journals the firstroller 9 thereon. A transverse bolt 17 pivotally connects the auxiliarybars at the point of intersection thereof and journals the third roller13 thereon. The second auxiliary bar 7 is pivotally conand third rollers9, 13 are removably secured on the bolts Figure 8 is a plan view on asmaller scale of the im- 15, 17 by cotter pins 19, 21 and said bolts 15,17 are each provided with a nut 23 and a collar 25- thereon beneath theroller for tightening the bolt on the frame 1 and with antifrictionwashers as at 2'7 and 29 one backing the nut 23 and the other betweenthe bars through which the bolt extends all as shown in Figure 3 inconnection with the bolt 15.

The second rollers 11 is removably mounted on one end of a hand screw 31threaded transversely through a boss 33 on the end 21 of the main bar 1for screw feed to advance and retract the second roller relative to thethird roller 13. The roller 11 is mounted on the screw 31 by means of ablock 35 through which said screw 31 is journaled and which is securedon said screw 31 between a collar 37 and washer 39 on the screw by acotter pin 41 in said screw. The block 35 has a stud 43 thereon on whichthe roller 11 is journaled and removably secured against a washer 45 onthe stud by a cotter pin 47 in the stud. A rod 49 slides in a side lug51 on the block 35 and traverses, and is welded, ,as at 53,. to the mainbar 1 and prevents the block 35 and roller 11 from turning with thescrew 31.

Means for locking the rollers 9, 11, 13 against rotation comprises pins55, 57 removably insertable through bores 59, 61 in the rollers 9, 11into sockets 63, 65 in the main bar 1 and block 35 and a similar lockingpin 67 and bore 71 in the roller 13 the pin 67 engaging a socket notshown in the auxiliary bar 5.

The main .bar 3 is provided with longitudinally spaced bolt holes 73,and the auxiliary bars 5 7 with similarly spaced bolt holes 75, 77. Thebolts 15, 19 can be inserted through selected bolt holes 73, '75 and 73,77 and the bolt 17 inserted through selected bolt holes 75, 77. Thisprovides means for adjusting the auxiliary bars 5, 7

crosswise and lengthwise of each other and of the main 3 bar 1 to varythe angular relation of said bars for varying the triangular arrangementof the rollers 9, 11, 13 for clamping and bending operations on stock ofdifierent sizes and for reamingflanges around holes of different sizes.

In using and operating the invention for clamping, for example,laminated flat strip stock for gluing or'bending as shown in Figure 1,the bars 3, 5, 7 are adjusted to space the roller 13 from the rollers 9,11 so that the implement may be placed with the main bar 3 extendingalong one side of the stock to engage the roller 13 with one side of thestrip 79 and the rollers 9, 11 with the other side and to apply pressureto said strip at said sides at longitudinally spaced pointsthereon. Theroller 11 is then screw fed toward the roller 13 against the strip 79whereupon said rollers will clamp said strip between the rollers 9, 11on the one hand and the roller 11 on the other hand with the roller 13between the rollers 9, 11. Further feed of the roller 11will bend thestrip 79 around the roller 13 as shown in Figure 10 wherein the bars 3,5, 7 have been shown adjusted to vary the spacing of said rollers forclamping and bending a wider laminated fiat strip 81. In such operationson flat strip stock rollers 9, 11, 13 with flat treads are preferablyused. In bendingsuch and other stock the rollers are locked by thedescribed locking means to prevent rolling thereof so that the implementwill not move along the strip during the bending operation. However therollers may be unlocked for rolling the implement 1 along the stock forprogressively clamping and/ or bending.

As shown in Figure 11 the bars 3, 5, 7 may be adjusted to vary thespacing of the rollers to space the roller 13 closer to the rollers 9,11 for bending thin strip stock 83 and, asshown in Figure 12, the barsmay be adjusted to space the roller 11 between the rollers 9, 13 forbending stock 85, between said rollers 9, 13.

As shown in Figure 5 concave rollers such as the roller .87 may replacethe rollers 9, 11, 13 for bending tubular or vround stock, and as shownin Figures 6, 7 the rollers 9, 11 13 may be replaced by V-groovedrollers, such'as the one designated .89 for bending operations onrectangular cross section bars or rods 90.

As shown in Figures 8 and 9 the bars 3, 5, 7 may be adjusted to spacereplacement V-grooved rollers 89 apart substantially equidistantly forreaming a flange 93 around a hole 95, in flat stock'97 by screw feedretraction of one of the rollers 89 to cause the work to be bent aroundthe hole .95 in response to rotation of the implement around the hole 95and screw feed of the one roller 91.

As will be seen in bending strip bar or round or tubular stock the bars3, 5, 7 may be variably adjusted to space the screw feed rolleroutwardly or inwardly of the third roller longitudinally of the stockfor bending the stock in difierent curves.

In the modification shown in Figure 13 a pair of the frames designated2, 4 are connected together by terminal- 1y pivoting the first auxiliarybar 6, 8 of each frame to the main bar 10, '12 of the other frame as at14,16 so that two pieces of stock 2a, 4a maybe bent by the screw feedrollers 18 or 20 of the frame around the third rollers 22 or 24 of theother frame and so that the bars of the frames may be adjustedrelatively like the bars 3, 5, 7 and the first auxiliary bars 6 and 8 ofeach frame adjusted across and longitudinally of the base bars 12, 10 ofthe other frame to variably space the screw feed rollers 18, 20 ofeither frame from said third rollers 22, 24 to increase the range ofvariable spacing of the rollers of the two frames for various bendingand clamping operations which it is not deemed necessary to discloseherein.

T he foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention asclaimed.

What is claimed as new is as follows:

1. A clamping and bending implement comprising a triangularl-y arrangedseries of rollers and a triangular frame, said frame comprising a baseside bar for positioning alongside elongated stock and a pair of firstand second auxiliary side bars intersecting the base side bar andintersecting each other at a point spaced from the base side bar, Saidseries of rollers including a pair of first and second presser rollersspaced along said base side bar for engaging one side of such stock and.a third roller at the point of intersection of said auxiliary bars forengaging the other side of such stock at a point intermediate said firstand second rollers, transverse bolts connecting the first auxiliary barto the base side bar at the points of intersection thereof and saidauxiliary bars at the point of intersection thereof and having the firstand third rollers journaled thereon, a transverse bolt connecting thesecond auxiliary bar to the base side bar at the point of theintersectiontherewith, .said base side bar having an end portionextending outwardly beyond the second auxiliary side bar, and screw feedmeans mounting the second roller on said extending end portion of thebase side bar outwardly of said second auxiliary side bar for advanceagainst such stock.

2 An implement according toclairn 1, and means for locking said rollersagainst rotation.

,3. An implement according .toclaim 1, said screw feed means comprisinga sorewshaft threadedthrough said extending end portion of said baseside bar, a block having said shaft journaled therein and said secondroller rotatably mounted. thereon, and means rigidly connecting saidblock to said base side bar to prevent said block from being rotated bysaid shaft.

References Cited in thefile of this patent UNITED STATES PATENTS 51,826Grifl'iths Jan. 2, 1866 1,493,177 Wright May 6, 1924 51,701,711 ValpianiFeb. 12, 1929 v FQREIGN PATENTS 14,680 Great Britain July 31, 1893

